Pirates didn't wear eyepatches because they were blind. They were them to keep one eye acclimated to the dark at all times. At night, they would switch the patch to the other eye and have perfect night vision.
The villain wrangler, read this post! <<<< I love this with every fiber of my being, this is beautiful and I now need someone to make it a show, or movie, or a book! I would read/watch the hell out of something like this!